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			It's pretty hard to tell. 
 
If a zippy 243 is 1 1/2" high at 100, it is probably somewhere near "on" at 200, and very close to "on" at about 35 yards.  If it is an inch low at 50, I don't know how to answer your question. 
 
The only way I know to tell is to set up targets at 50, 100, 200, and 300, and see what it does.
		 
		
		
		
		
		
		
		
		
	
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